Gems waiting to be polished are seen sitting atop a can in Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 14, 2009. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA)